Acid-storage tank.



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.1. voLLMER. ACID STORAGE TANK.

(Application led Apr. 24, 1901.)

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JOHN VOLLMER, OF BOSTON, MASSACHUSETTS.

ACIDHSTORAGE TANK.

SPEGIFILQATGN forming part of Let-ters kateat No. 684,65 5, datedOctober 15, 190.1.

Application fled April 24, 1901. Serial No. 57,195. (N0 mvdel T0 allwhom, t 71mg concern,.-

Be it known that I, JOHN VOLLMER, a citizen of the United States,residing at Boston, in the county of Suifolk and State of Massachusetts,have invented a new and useful lmprovement in Acid Receiving or StorageTanks, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification, in explaining its nature.

The invention relates to the herein described improvement ...in acidreceiving or storage tanks. Tanks of this character are largely used inthe sultlte process of making pulp for holding acid and for receivinggas from the digester. lleretofore such gas has been introduced into thetank by means of a brass or copper pipe permanently secured to the topof-l'the tank, extending through it, and also extending downward towithin about eighteen inches of the bottom of the tank, the purpose ofthe pipe being to convey the gas and liquor from the digester to theacid-tank and also to deliver it in the acidtank near the bottomthereof, as such delivery is necessar)7 for the proper' combining of thegas with the acid, thereby making the acid more uniform in strength.This construction, however, is not found to be satisfactory in use onaccount of the fact that the acid in which the pipe entends eats it tosuch an extent as to sever or perforate it and weaken it and formdischarge-holes for the gas in all parts of the chamber, so that its useas a means for introducing the gas to the acid near the bottom of thechamber is not to be depended upon. When the pipe has become thusperforated and damaged, it is necessary to remove it and substituteanother, and this has always been a matter of trouble and expense, inthat it is necessary to remove all the acid from the tank before thepipe can be reached. It should be understood that these tanks are fromten to twenty feet high and that the pipes are from two inches to sixinches in diameter, that they are suspended from the top of the tank,and that therefore they are not readily accessible even after the acidhas been drawn off. Pipes of lead are not readily attacked by the acid,but they have not been used because of their weight and because of thevibration of the pipe, which very shortly breaks or severs it near thehead of the tank. Iron pipe cannot be used, because it will not standthe attacks of the acid.

My invention consists in the use of lead pipe which is reinforced andmade stable by one or more stays of a metal of greater tensile strength,which is attached to the part of the pipe in the tank and is entirelycovered with lead within the tank, so that the acid may not affect it.By the use of this means it becomes possible to employ lead pipe and tosuspend it from the head of the tank without danger of its becomingdetached therefrom because of its movement or oscillation.

The invention relates to features of construction which will bedescribed in connection with the drawings, wherein-- Figure l is a Viewin vertical cross-section of an acid receiving or storage tank .and thefeed pipe. Fig. 2 represents a horizontal cross-section of the feed-pipeas reinforced. Fig. 3 is a modified form of the same.

Referring to the drawings, A represents an acid receiving or storagetank of conventional form. Itis generallylined with lead. It has themanhole @,by which its interior is reached. It has through its upper endor head B a hole ZJ, through which the gas-feed pipe C is introducedinto the chamber a of the tank. This feed-pipe has an open lower end cnear the bottom of the tank, by means of which the gas is fed to thecontents of the tank. It is made of lead and a metal of greater tensilestrength than lead. In the drawings I have representedit as combinedwith two longitudinal bars c c2, of iron or steel, extending on theoutside of the pipe,lengthwise it,and upon opposite sides of the pipeand each united to the pipe by a covering c3, of lead, brazed orotherwise attached to the pipe. These iron or steel bars may be providedwith perforaa tions c4, through which the lead may knit beL` tween thepipe and the outer covering. The portions of the steel or iron barsinside the tank are entirely covered by lead, so that no portion of themcan be reached by the acid. They extend downward as far as may beneeessary for the proper support and suspension of the pipe. Theyext-end upward through the hole b in the head and have their upper endsc5 turned outward above the head to furnish ears or flanges to rest ensupports c6 IGC beneath them, and thus act as the proper means forhanging or suspending the pipe in the chamber of the tank. I havedescribed them as made of iron or steel; but they may be made of anyother metal of suitable tensile strength. One bar only may be used ormore than one.

In Fig. 3 as a modification I have represented the lead pipe as inclosedWithin an iron pipe, preferably perforated, which iron pipe andperforations are covered and filled with lead attached to the inner pipeand so that the iron pipe is entirely protected from the acid. The leadpipe has attached to it a Wide lead ange D, which extends upon the headof the tank on its upper surface about the edge of the hole and isfastened to the head by screws or in any other desired Way, and a gasketof acid-proof packing may be placed between the iiange and the head, ifdesired. A lead pipe reinforced by protected means of the characterspecified has long life, because the lead resists the action of the acidand because the lead pipe, being stayed and supported, will not be movedby the gas to the extent that it Would be moved if unsupported, and anymovement that it may have is borne by the reinforcements rather than bythe lead pipe itself.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United Statesl. The improvement in acidreceiving or storage tanks herein described, the same comprising afeedingpipe of lead extending to near the bottom of the tank and thereopening into the tank, a metallicreinforcement of greater tensilestrength than lead combined with the outside of the pipe attached to thetank, to sustain the pipe and having that portion Within the tankprotected from acid by a covering of lead.

2. The combination of a tank for receiving or storing acid with afeed-pipe of lead, ex-

tending through the tank to near the bottom thereof where it opens,having one or more metal reinforcements of greater tensile strength andrigidity than lead combined with it in the tank to stiifen it, attachedto the outside of the tank to support it, having the portion Within thetank coated 0r covered With lead, Whichis also attached to the lead 3.The combination of an acid receiving or storage tank, a lead supply-pipeextending from Without the tank through an end thereof to near thebottom of the tank, a metal reinforcement combined with the lead pipe t0stiften and sustain it in the tank and to also suspend it from the endof the tank, the metal reinforcement and lead pipe Within the tank beingunited by a lead covering, which covers and protects the reinforcementfrom acid, and a lead liange extending from the lead pipe upon the endof the tank about the hole through which the pipe enters it.

4. The feeding-pipe for an acid receiving or storage tank, comprising alead pipe, a metal reinforcement, having at its outer end means forattachment to the outside of the tank, and the said lead pipe havingalead iiange which surrounds the pipe and the metal reinforcement.

5. The combination of a tank for receiving or storing acid and a leadsupply-pipe having a metal reinforcement upon each side thereof ofgreater tensile strength and rigidity than the lead pipe united to thelead pipe by a lcovering of lead which protects it from the acid, thesaid reinforcements being opposed to each other and the ends of whichoutside the tank extend outward to act as supports by means of Which thelead pipe and its reinforcements are suspended in the tank.

JOHN VOLLMER. Witnesses:

WM. A. MGKEE, GEO. F. Rovvn.

